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#ifndef MOZC_BASE_UNNAMED_EVENT_H_
#define MOZC_BASE_UNNAMED_EVENT_H_

#include "base/scoped_handle.h"

#ifndef OS_WIN
#include <pthread.h>
#endif

namespace mozc {

// UnnamedEvent is a simple event object shared by multiple threads.
class UnnamedEvent {
 public:
  UnnamedEvent();
  virtual ~UnnamedEvent();

  // Waits an event. Can set a maximum timeout value.
  // Return true if the event object receives a notification event from
  // different thread.
  bool Wait(int msec);

  // Raises a notification event.
  bool Notify();

  // Returns true if this event object is available.
  bool IsAvailable() const;

 private:
#ifdef OS_WIN
  ScopedHandle handle_;
#else
  pthread_cond_t cond_;
  pthread_mutex_t mutex_;
  bool notified_;
#endif
};
}  // namespace mozc

#endif  // MOZC_BASE_UNNAMED_EVENT_H_